How to Measure Size in m²

It is simple to calculate the square metre size of an area.

When measuring rectangular shaped areas. Just multiply the length by the width in metres and you have the answer.

When measuring more complex shapes it is best to divide them into separate rectangles and then add them together to get a total area.

Frequently Asked Questions

Why seal?

Building materials such as natural stone, tile, masonry, concrete and grout are all made up of countless invisible capillary pores. This makes them porous and allows the absorption of damaging liquids such as water, water-borne salts and oils. These liquids cause the building material to deteriorate prematurely and in so doing reduce their usefulness. Examples of deterioration include; weathering, loss of strength, efflorescence, salt attack, freeze-thaw spalling, sulphate attack, alkali aggregrate reaction, unsightly staining, biological attack, reinforcement rusting, chemical attack, swelling, thermal conductivity, embrittlement and picture framing. Sealing can help eliminate or significantly reduce most of these problems.

What type of sealer should I use?

There are two main types of sealers, namely, topical sealers and impregnating sealers. A topical sealer will provide a physical barrier over the surface, which also results in the darkening of the surface as a result of the coating that was applied to it. These coatings usually wear and weather relatively quickly, they also make the surface more slippery when wet and must be completely stripped off when re-coating. Salts may also build-up under the surface, causing the coating to appear cloudy. Impregnating sealers can be classified as those that repel water and those that repel both water and oil based stains. Impregnating sealers usually have little effect on the frictional properties and appearance of the surface but will not completely stop dirt and rubber getting into the open pores of the surface. When comparing impregnating sealers the two most important questions to ask are: (a) how long does it last? and (b) how deep does it penetrate below the surface? A good depth of penetration is important to provide protection against traffic wear and weathering.

How do I calculate the amount of sealer required?

To determine how much sealer you'll need, measure the length and width of the area to be sealed. The amount of sealer used will depend on the particular material being sealed. For example, to seal a wet-poured cement-based paver you will need 1 litre per 7 sq.m. (1 quart per 70 sq.ft. per quart) and for sandstone you will need 1 litre per 4 sq.m. (1 quart per 40 sq.ft. per quart). Your Dealer will be able to provide a guide to the amount of sealer needed for a particular material being sealed.

Where can I buy your product?

You can buy our products from our online shop, or from one of the dozens of Accredited Applicators throughout the country. Please refer to our "Online Shop" part of this web site or telephone or e-mail us to find out the easiest way for you to obtain our products.

What is the best method for application?

You can apply the product with a lamb's wool applicator, paint brush, roller, mop etc. Whatever suits you best!

Why two coats?

We recommend application of two coats in case an area was missed when applying the first coat.

Can someone supply and apply your product for me?

There is a large number of Accredited Applicators who use Deepshield™. These Accredited Applicators can provide you with a written lump sum quote to prepare, supply and apply one of our products. These Accredited Applicators are independent Contractors with proven track records and training in the use of Deepshield™ products.

Should the sealer be water-based or solvent-based?

Sealers need a carrier to take the active ingredients onto or into the surface. This carrier is either water or a non-water based solvent.

Why is it necessary to carry out a test trial with the sealer before doing the full job?

Every surface is subtlety different. Unless you have applied the sealer to the exact same surface with the same conditions before it is a must to carry out a small trial to ensure you get the result you are after. For example, a surface that has been treated with an artificial organic dye (unknown by the customer) may be removed when the sealer is applied.

How do I maintain a sealed tile?

The long-term good looks of a sealed surface will depend on maintenance. Removing spills immediately, using diluted bleach to remove marks and routine cleaning and scrubbing of the surface will keep surfaces looking good for longer.

After Deepshield™ sealer has been put down what cleaning products can I use for everyday cleaning?

Use non-acidic cleaners or a light cleaner like dishwashing liquid or just plain water. Use a damp mop or cloth. There is no need to use harsh detergents, or cleaners containing chlorine or abrasive material.

I have applied your sealer and now have a sticky residue on the surface. What can I do?

This sometimes occurs when excess sealer has been left on the surface. If the sealer is less than a few days old the residue can be removed by applying some of the sealer to a dry white cotton towel and polishing the residue until the surface is clean. This should dissolve the residue. If the residue has dried then applying some of paint stripper to a dry white towel and polish the residue until the surface is clean. A nylon-scouring pad may also help remove really stubborn residue.

Is it normal to still get scuff marks on a surface that has been treated with an impregnating sealer?

Yes. Since impregnating sealers do not fill the surface pores, marks from the likes of rubber soled shoes or tanin from tree leaves can still discolour the surface. The good news is that the sealer holds the contaminating agent close to the surface. Usually, a diluted acid free bleach and light scrubbing will remove most marks caused by organic contaminating agents such as oil etc. Deepshield™ impregnating sealers are bleach tolerant.

How can I remove excess product that has dried on the surface of my tiles while sealing it?

This can happen if the surface is too hot (if the surface is hot to touch then it is too hot to seal!) or excessive product has been applied for that type of material. Try removing the excess by wetting a dry white cloth in the sealer and removing the residue. After removing the excess you should check if the cleaned surface still repels water. If not then you should re-seal those affected areas again.

How can I get maintenance free tiles?

Even surfaces sealed with impregnating sealers will mark. To obtain a maintance free surface you will need to use an epoxy or polyurethane surface coating or use a vitreous tile. However, surface coatings do have a number of problems as they do not breathe and so trap unsightly water vapour under the surface, they also have to be removed when recoating, are very expensive to install and they significantly change the look of the surface.

What is 'picture framing'?

This is a term used to describe a discolouration that may occur to the outer rim of the surface of the tile. The source is usually either the seepage of grout into the tile or, for cement based materials, an uneven curing of the cement in the tile or, water. Picture framing is usually irreversible and it is best to prevent it from occurring. Preventive measures include pre-sealing the upper-surface of the sides of the tile.

Will I still get some staining after sealing?

We believe Deepshield™'s products are the best impregnating sealers money can buy. However, they do have their limits. For instance they will not stop surface etching, so to minimize absorption the spill should be cleaned up immediately. If you want your surface to be "bullet proof" you may have to use a polyurethane coating (which will need recoating every few years, change the look and cause water to build-up underneath) or use a glazed ceramic tile. We recommend regular cleaning of treated exterior surfaces with PH neutral products.

What do I do if there is already a sealer on the surface I want to seal?

All pre-existing surface sealers must be removed before applying Deepshield™ to any surface, as the coating left by the old surface sealer may block the product from penetrating the surface of the tile. You don't however need to worry about stripping pre-existing penetrating impregnating sealers as Deepshield™ impregnating sealer will pass through virtually any other impregnating sealer.

I have sealed my surface with a impregnating sealer. Can I apply a surface sealer over the treated surface?

Yes, but you will need to wash the surface with solvent such as methylated spirits or better still acetone and use a solvent-based surface sealer. The reason for this is because only a solvent-based surface sealer will adhere to an impregnated surface.

Will sealing my sandstone or limestone make it "salt safe"?

Some customers believe that our treatments will make their sandstone or limestone 'salt safe'. This is not accurate. There is no doubt that our sealers will provide a considerable long-term benefit in resisting the ingress of water and salt into the stone. However, the treated stone will not necessarily become 'salt safe'. Rather, it becomes far more resistant to the ingress of salt. The amount of salt already in the stone prior to treatment, the proximity to salt water, the type and concentration of the salts in the water, the type and quality of the stone and sub-soil drainage will all affect the durability of the stone. Please note that although we believe our sealers are the best available on the market they must be applied correctly. With proper application sealers will significantly improve the durability of the stone in a salt water environment.

If I seal a tile or paver on all sides, will a tile adhesive still stick to it?

After a tile or paver is sprayed with one of our impregnating sealers on all sides, or dip-sealed (immersed in the sealer for a few seconds) it becomes water repellent. Therefore plain sand and cement mortar will have trouble sticking to it. There are polymer modified adhesives available which will work to over come this water repellency - and in fact benefit as mixing water loss due to capillary suction is effectively stopped. Deepshield™ have test results for 2 such sealers by popular brand Davco: 1) Davco SMP2010. 2) SE-7. An additive called Davelastic can be mixed with SE-7 for extra adhesion.

I am about to seal but have discovered large "white" marks on my cement pavers.

After their installation cement pavers are often acid washed to remove grout marks. If the pavers have not been thoroughly neutralized and rinsed clean with fresh water after acid washing then the residue from the acid wash may show up as a large white mark on the surface. These marks may be removed using a mild acid such as phosphoric acid diluted in water and scrubbed on the mark. Always test the use of any acid first in an inconspicuous area.

What is efflorescence?

Efflorescence is a problem affecting all cement based building materials. This includes pavers, brickwork, blockwork, concrete, render, grout and tiles. In every kilogram of cement-based material there are also many grams of water-soluble salts. Most commonly, efflorescence begins when unused lime compounds from the cement are dissolved in mixing water, ground water or rain. Evaporation of the water brings these lime compounds to the surface where they can react with carbon dioxide in air to form insoluble crystalline calcium carbonate. This is the unsightly white powdery material we often see on pavers that detracts from what should otherwise be an attractive and clean surface. In extreme cases the efflorescence can obscure the surface and the crystallisation can cause erosion and pitting. Eventually, the calcium carbonate may react with more carbon dioxide to form calcium bicarbonate - a material that is water-soluble. The surface may become clean after a number of months or years in the outdoors. Understandably, not everyone wants to wait that long. And since first impressions are always lasting, it's worth preventing efflorescence problems from the start. Just washing the efflorescence off the surface usually starts an almost endless cycle of more efflorescence rising to the surface. After only a few days the surface is as powdery as before. The answer is to seal the surface with a high performance sealer as soon as is practical after the building material is installed. The sealer must be deeply penetrating, able to withstand the highly alkaline environment found in cement based-materials and be completely breathable so moisture cannot be trapped below the surface. Once the surface is sealed a deep water-repelling layer is formed. This layer will prevent water and dissolved lime compounds from reaching the surface where efflorescence could occur. At the same time the sealer stops further water soaking into the surface and so breaks the cycle of efflorescence. The unused lime compounds are left harmlessly immobile in the core of the building material with little contact with carbon dioxide. Since the sealer can breathe, sub-surface moisture can escape as water vapour rather than in a liquid form.

Will sealing stop my shower leaking?

The most common reasons why a shower will leak are (a) leaking pressure pipes in the wall (b) sheet membrane under the tiles has failed and (c) joint between the shower drain and tiles has failed. If the grout and flexible joint sealant in the shower are in a good condition then sealing with Deepshield™ Penetrating Sealer is certainly an excellent relatively inexpensive first option in stopping the leak. Fixing a leaking pressure pipe is a job for a plumber.

Can I seal underwater?

Our products are not recommended for surfaces constantly underwater. The reason is that they work by stopping capillary suction and under constant water pressure the repellency is overcome and water penetrates via permeation and diffusion. The time it takes to overcome the repellency depends on the pore size of the stone and the water pressure. With a one metre pressure head it could take treated concrete 18 months but with 3 inches of water over porous bricks it could be days. Having said all that, if the stone is exposed to the air and allowed to dry regularly the repellency will be restored and the 'clock' starts again.

An alternative is a clear epoxy coating, although epoxies have a lot of other problems. If an architect or engineer insists on using an impregnator then make sure the entire stone is dipped sealed in Deepshield™ Penetrating Sealer and then when the stone is fixed in place apply the Deepshield™ Penetrating Sealer. The Deepshield™ Penetrating Sealer is a particularly good water repellent for low silica based stone.

How should Deepshield™ Penetrating Sealer be handled when used near glazed ceramic tile?

Only Solvent-based sealers can be used on glazed ceramic tiles, Deepshield™Penetrating Water-based Sealer can not be used on glazed ceramic tiles is might not penetrate completely through causing a bigger problem than before sealing.

Cleaning Myths

Sealing a surface with a Deepshield™ impregnating sealer will make the surface stain resistant, but not dirt resistant. The sealed surface should be cleaned as regularly as a non-sealed surface. If a problematic substance such as sticky tree gum falls on the surface, it will still be difficult to clean off, but should not permanently stain the surface.

I have just sandblasted a large farmhouse kitchen fireplace and now want to seal it. The problem has been that all local builders merchants recommend sealants that are flammable - a big problem!! The fireplace is brick with a slate base and log burner

Our Deepshield™ Penetrating Sealer is an excellent impregnating sealer but it too is flammable when you open the can. However, within one hour after it has been applied all the alcohol has evaporated and then it remains inert and not flammable.

How can you remove efflorescence and water marks from an acid sensitive surface?

There are products specifically designed to remove efflorescence and fresh cement grout haze from surfaces including acid sensitives surfaces such as marble and limestone. Water marks appear as white residue after the water has dried. It is made up of calcium, fluoride, magnesium and other like minerials and will also be removed using these products.

Are your products environmentally responsible?

Yes. Deepshield™ sealers are fast curing water based sealers and can be used indoors or out, with no unpleasant odours or flammability problems.

What should I use first; Deepshield™ Penetrating Sealer or Deepshield™ Color Enhancer?

Its a good idea to use the Deepshield™ Color Enhancer first so you achieve the desired color of the surface. Once that is done, wait 24 hours for it to cure and apply Deepshield™ Penetrating Sealer to obtain better resistance to oil stain.

Can I paint over a surface already treated with Deepshield™ Penetrating Sealer?

Its is possible to paint over a surface that has been treated with Deepshield™ Penetrating Sealer but only if a solvent based primer is used first, otherwise the treated surface will repel the paint.

How do I know which brand of sealer to buy?

The market offers the consumer many brands of sealer with similar claims. Deepshield™ sealers are different in two important ways. Firstly, they penetrate deeper giving protection against weathering, traffic wear, efflorescence, salt attack and freeze-thaw attack. Secondly, they have a lifetime of up tp 10 years. Naturally, we would like you to use a Deepshield™ sealer but if not, please do seal and choose another professional supplier.

How is Deepshield™ Color Enhancer different to some other similar treatments?

The Deepshield™ Color Enhancer will enhance the color of the surface without changing its wet slip frictional properties. Because of this, it will not make your natural stone flooring any more or less slippery. This is essential in keeping a safe trafficable surface in all weather conditions.

How old does cement based grout need to be before sealing?

It is recommended that grout needs to be allowed a minimum of 3 days to cure before sealing.

Should I buy a sealed natural stone or an engineered stone counter top?

It is difficult to give an unbiased opinion on this. Engineered stone is crushed stone mixed in epoxy resin. Like most fashion fads, at the start it looks great but it is certainly not maintenance free. Over time engineered stone will discolor and require a sanding and repolish to bring it back to life. In our opinion nothing beats the timeless good looks of natural stone. Sealed natural stone provides an excellent natural and durable work top that can take hot pans, sunlight and anything else life throws at it.

How do I know if my surface is still adequately sealed?

You can carry out the following water test; place a tablespoon of water on the treated surface for 20 minutes, blot up the water with a tissue, pressing hard to soak up any water in the texture of the surface. If the water is absorbed or leaves a dark mark the surface needs more sealing.

Will sealing stop the growth of moss and mold on my concrete and masonry

Moss, mold and other biofilms will even grow on glass under the right environmental conditions. However, moss and mold need water to survive and sealing the surface with Deepshield™ Penetrating Sealer will significantly reduce the amount of water available and so greatly reduce the growth of micro-organisms including green algae, moss and cyanobacteria. It should be noted that cleaners such as bleach has no residual effect and will not stop the regrowth of biofilms.

Can I apply a topical coating to a surface already treated with Deepshield™ Penetrating Sealer?

Deepshield™ does not recommend this due to possible bond and/or aesthetic issues. If you decide to go ahead please carry out a test patch first to determine the result.

Why is my outside limestone patio still fading even though I have sealed the surface?

Pure water has a pH of 7.0. However, normal rain is slightly acidic because carbon dioxide (CO2) dissolves into it forming weak carbonic acid, giving the resulting acidic mixture a pH of approximately 4.3 to 5.6 at typical atmospheric concentrations of CO2. Limestone is sensitive to acidic liquids and when used outside will etch causing surface roughness and giving the appearance of fading. Impregnating sealers can reduce but not stop this phenomena.

Will any Deepshield™ product change the appearance of my tiles and grout?

No! All Deepshield™ products are penetrating sealers that seal the pores in tile and stone surfaces. They will not change the feel, texture or colour of the treated surface as they dry invisible, the only exception to this is the Deepshield™ Color Enhancer which will slightly darken and highlight the character of natural stone. Deepshield™ products are also resistant to UV light.

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EFFORESCENCE PROTECTION & REMOVAL

efflorescence protectiov and removal

Deepshield™ water-repellent deep impregnating sealer will provide protection and a reasonable lifespan to stone and masonary surfaces in areas with salt-water such as around a saltwater pool or close to a beach.

TESTIMONIALS

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“I used my sealer to seal my outdoor stone pavers, couldn’t be happier, Deepshield works like a charm.”

-James Kinsey JK Renovations

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